摘要：Traffic noise measurements are usually performed with the microphone located at
a standardised position. In order to test the influence of microphone
position (including its height and its distance from façade) a computer model
has been developed which includes noise reflection at neighbouring surfaces
as well as vehicle trajectory and its associated Doppler spectral
warping. Detailed FFT spectrum as well as octave and one third of an octave
spectra have been computed for different microphone configurations. Results
show that influence is not negligible when measuring noise spectrum, for
instance, for spectral noise mapping. Hence, measurement position must
be specified accurately
